Noun eureka has 2 senses
  1. constantan, Eureka - a copper-nickel alloy with high electrical resistance and a low temperature coefficient; used as resistance wire
    --1 is a kind of copper-base alloy
  2. Eureka - a town in northwest California on an arm of the Pacific Ocean
    --2 is a kind of
    town
    --2 is a part of California, Golden State, CA, Calif.
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